28648188 has 24 divisors (see below), whose sum is σ = 74273360. Its totient is φ = 9549360.

The previous prime is 28648187. The next prime is 28648199. The reversal of 28648188 is 88184682.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28648183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132523 + ... + 132738.

Almost surely, 2^28648188 is an apocalyptic number.

It is an amenable number.

28648188 is an abundant number, since it is smaller than the sum of its proper divisors (45625172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28648188 is a wasteful number, since it uses less digits than its factorization.

28648188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265274 (or 265266 counting only the distinct ones).

The product of its digits is 196608, while the sum is 45.

The square root of 28648188 is about 5352.4002092519. The cubic root of 28648188 is about 305.9842360199.

The spelling of 28648188 in words is "twenty-eight million, six hundred forty-eight thousand, one hundred eighty-eight".